此命令在几个 Lubuntu 系统上运行良好。但是,我第一次在 Ubuntu 系统上尝试它时,却没有成功。
$ lsb_release -d
Description: Ubuntu 14.04.4 LTS
$ sudo do-release-upgrade -d
[sudo] password for xxxxxx:
Checking for a new Ubuntu release
No new release found
我遗漏了什么?
编辑 - - - - - - - - - - - - - - - -
在执行了 Michael Krell 的建议后
sudo apt-get dist-upgrade
现在当我发出命令时sudo do-release-upgrade -d
我得到
Err Upgrade tool signature
404 Not Found [IP: 91.189.91.23 80]
Err Upgrade tool
404 Not Found [IP: 91.189.91.23 80]
Fetched 0 B in 0s (0 B/s)
WARNING:root:file 'utopic.tar.gz.gpg' missing
Failed to fetch
Fetching the upgrade failed. There may be a network problem.
答案1
现在它可以正常工作了。我只能假设 Ubuntu 服务器端出现了一些问题。